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labwork [276]
3 years ago
8

A planet has a circular orbit around a star. It is a distance of 65,000,000 km from the centre of the star. It orbits at an aver

age speed of 65,000 km/h. How many Earth days does it take the planet to orbit the star? Give your answer to 2 sf.​
Mathematics
1 answer:
guapka [62]3 years ago
8 0

Answer:

Step-by-step explanation:

Orbit = 2*pi * r

r = 65000000 km

Orbit = 65000000 * 2 * 3.14

Orbit = 406 200 000             km

d = 406 200 000

s = speed = 65000 km / hr

t = time = d / s

t = 406,000,000 / 65000

t = 6280 hours.

1 day = 24 hours.

t = 6280 / 24 = 261.67 days

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